sound/soc/samsung/i2s.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // ALSA SoC Audio Layer - Samsung I2S Controller driver
   4 //
   5 // Copyright (c) 2010 Samsung Electronics Co. Ltd.
   6 //      Jaswinder Singh <jassisinghbrar@gmail.com>
   7
   8 #include <dt-bindings/sound/samsung-i2s.h>
   9 #include <linux/delay.h>
  10 #include <linux/slab.h>
  11 #include <linux/clk.h>
  12 #include <linux/clk-provider.h>
  13 #include <linux/io.h>
  14 #include <linux/module.h>
  15 #include <linux/of.h>
  16 #include <linux/of_device.h>
  17 #include <linux/of_gpio.h>
  18 #include <linux/pm_runtime.h>
  19
  20 #include <sound/soc.h>
  21 #include <sound/pcm_params.h>
  22
  23 #include <linux/platform_data/asoc-s3c.h>
  24
  25 #include "dma.h"
  26 #include "idma.h"
  27 #include "i2s.h"
  28 #include "i2s-regs.h"
  29
  30 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
  31
  32 #define SAMSUNG_I2S_ID_PRIMARY          1
  33 #define SAMSUNG_I2S_ID_SECONDARY        2
  34
  35 struct samsung_i2s_variant_regs {
  36         unsigned int    bfs_off;
  37         unsigned int    rfs_off;
  38         unsigned int    sdf_off;
  39         unsigned int    txr_off;
  40         unsigned int    rclksrc_off;
  41         unsigned int    mss_off;
  42         unsigned int    cdclkcon_off;
  43         unsigned int    lrp_off;
  44         unsigned int    bfs_mask;
  45         unsigned int    rfs_mask;
  46         unsigned int    ftx0cnt_off;
  47 };
  48
  49 struct samsung_i2s_dai_data {
  50         u32 quirks;
  51         unsigned int pcm_rates;
  52         const struct samsung_i2s_variant_regs *i2s_variant_regs;
  53 };
  54
  55 struct i2s_dai {
  56         /* Platform device for this DAI */
  57         struct platform_device *pdev;
  58
  59         /* Frame clock */
  60         unsigned frmclk;
  61         /*
  62          * Specifically requested RCLK, BCLK by machine driver.
  63          * 0 indicates CPU driver is free to choose any value.
  64          */
  65         unsigned rfs, bfs;
  66         /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
  67         struct i2s_dai *pri_dai;
  68         /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
  69         struct i2s_dai *sec_dai;
  70
  71 #define DAI_OPENED      (1 << 0) /* DAI is opened */
  72 #define DAI_MANAGER     (1 << 1) /* DAI is the manager */
  73         unsigned mode;
  74
  75         /* Driver for this DAI */
  76         struct snd_soc_dai_driver *drv;
  77
  78         /* DMA parameters */
  79         struct snd_dmaengine_dai_dma_data dma_playback;
  80         struct snd_dmaengine_dai_dma_data dma_capture;
  81         struct snd_dmaengine_dai_dma_data idma_playback;
  82         dma_filter_fn filter;
  83
  84         struct samsung_i2s_priv *priv;
  85 };
  86
  87 struct samsung_i2s_priv {
  88         struct platform_device *pdev;
  89         struct platform_device *pdev_sec;
  90
  91         /* Lock for cross interface checks */
  92         spinlock_t pcm_lock;
  93
  94         /* CPU DAIs and their corresponding drivers */
  95         struct i2s_dai *dai;
  96         struct snd_soc_dai_driver *dai_drv;
  97         int num_dais;
  98
  99         /* The I2S controller's core clock */
 100         struct clk *clk;
 101
 102         /* Clock for generating I2S signals */
 103         struct clk *op_clk;
 104
 105         /* Rate of RCLK source clock */
 106         unsigned long rclk_srcrate;
 107
 108         /* Cache of selected I2S registers for system suspend */
 109         u32 suspend_i2smod;
 110         u32 suspend_i2scon;
 111         u32 suspend_i2spsr;
 112
 113         const struct samsung_i2s_variant_regs *variant_regs;
 114         u32 quirks;
 115
 116         /* The clock provider's data */
 117         struct clk *clk_table[3];
 118         struct clk_onecell_data clk_data;
 119
 120         /* Spinlock protecting member fields below */
 121         spinlock_t lock;
 122
 123         /* Memory mapped SFR region */
 124         void __iomem *addr;
 125
 126         /* A flag indicating the I2S slave mode operation */
 127         bool slave_mode;
 128 };
 129
 130 /* Returns true if this is the 'overlay' stereo DAI */
 131 static inline bool is_secondary(struct i2s_dai *i2s)
 132 {
 133         return i2s->drv->id == SAMSUNG_I2S_ID_SECONDARY;
 134 }
 135
 136 /* If this interface of the controller is transmitting data */
 137 static inline bool tx_active(struct i2s_dai *i2s)
 138 {
 139         u32 active;
 140
 141         if (!i2s)
 142                 return false;
 143
 144         active = readl(i2s->priv->addr + I2SCON);
 145
 146         if (is_secondary(i2s))
 147                 active &= CON_TXSDMA_ACTIVE;
 148         else
 149                 active &= CON_TXDMA_ACTIVE;
 150
 151         return active ? true : false;
 152 }
 153
 154 /* Return pointer to the other DAI */
 155 static inline struct i2s_dai *get_other_dai(struct i2s_dai *i2s)
 156 {
 157         return i2s->pri_dai ? : i2s->sec_dai;
 158 }
 159
 160 /* If the other interface of the controller is transmitting data */
 161 static inline bool other_tx_active(struct i2s_dai *i2s)
 162 {
 163         struct i2s_dai *other = get_other_dai(i2s);
 164
 165         return tx_active(other);
 166 }
 167
 168 /* If any interface of the controller is transmitting data */
 169 static inline bool any_tx_active(struct i2s_dai *i2s)
 170 {
 171         return tx_active(i2s) || other_tx_active(i2s);
 172 }
 173
 174 /* If this interface of the controller is receiving data */
 175 static inline bool rx_active(struct i2s_dai *i2s)
 176 {
 177         u32 active;
 178
 179         if (!i2s)
 180                 return false;
 181
 182         active = readl(i2s->priv->addr + I2SCON) & CON_RXDMA_ACTIVE;
 183
 184         return active ? true : false;
 185 }
 186
 187 /* If the other interface of the controller is receiving data */
 188 static inline bool other_rx_active(struct i2s_dai *i2s)
 189 {
 190         struct i2s_dai *other = get_other_dai(i2s);
 191
 192         return rx_active(other);
 193 }
 194
 195 /* If any interface of the controller is receiving data */
 196 static inline bool any_rx_active(struct i2s_dai *i2s)
 197 {
 198         return rx_active(i2s) || other_rx_active(i2s);
 199 }
 200
 201 /* If the other DAI is transmitting or receiving data */
 202 static inline bool other_active(struct i2s_dai *i2s)
 203 {
 204         return other_rx_active(i2s) || other_tx_active(i2s);
 205 }
 206
 207 /* If this DAI is transmitting or receiving data */
 208 static inline bool this_active(struct i2s_dai *i2s)
 209 {
 210         return tx_active(i2s) || rx_active(i2s);
 211 }
 212
 213 /* If the controller is active anyway */
 214 static inline bool any_active(struct i2s_dai *i2s)
 215 {
 216         return this_active(i2s) || other_active(i2s);
 217 }
 218
 219 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
 220 {
 221         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 222
 223         return &priv->dai[dai->id - 1];
 224 }
 225
 226 static inline bool is_opened(struct i2s_dai *i2s)
 227 {
 228         if (i2s && (i2s->mode & DAI_OPENED))
 229                 return true;
 230         else
 231                 return false;
 232 }
 233
 234 static inline bool is_manager(struct i2s_dai *i2s)
 235 {
 236         if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
 237                 return true;
 238         else
 239                 return false;
 240 }
 241
 242 /* Read RCLK of I2S (in multiples of LRCLK) */
 243 static inline unsigned get_rfs(struct i2s_dai *i2s)
 244 {
 245         struct samsung_i2s_priv *priv = i2s->priv;
 246         u32 rfs;
 247
 248         rfs = readl(priv->addr + I2SMOD) >> priv->variant_regs->rfs_off;
 249         rfs &= priv->variant_regs->rfs_mask;
 250
 251         switch (rfs) {
 252         case 7: return 192;
 253         case 6: return 96;
 254         case 5: return 128;
 255         case 4: return 64;
 256         case 3: return 768;
 257         case 2: return 384;
 258         case 1: return 512;
 259         default: return 256;
 260         }
 261 }
 262
 263 /* Write RCLK of I2S (in multiples of LRCLK) */
 264 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
 265 {
 266         struct samsung_i2s_priv *priv = i2s->priv;
 267         u32 mod = readl(priv->addr + I2SMOD);
 268         int rfs_shift = priv->variant_regs->rfs_off;
 269
 270         mod &= ~(priv->variant_regs->rfs_mask << rfs_shift);
 271
 272         switch (rfs) {
 273         case 192:
 274                 mod |= (EXYNOS7_MOD_RCLK_192FS << rfs_shift);
 275                 break;
 276         case 96:
 277                 mod |= (EXYNOS7_MOD_RCLK_96FS << rfs_shift);
 278                 break;
 279         case 128:
 280                 mod |= (EXYNOS7_MOD_RCLK_128FS << rfs_shift);
 281                 break;
 282         case 64:
 283                 mod |= (EXYNOS7_MOD_RCLK_64FS << rfs_shift);
 284                 break;
 285         case 768:
 286                 mod |= (MOD_RCLK_768FS << rfs_shift);
 287                 break;
 288         case 512:
 289                 mod |= (MOD_RCLK_512FS << rfs_shift);
 290                 break;
 291         case 384:
 292                 mod |= (MOD_RCLK_384FS << rfs_shift);
 293                 break;
 294         default:
 295                 mod |= (MOD_RCLK_256FS << rfs_shift);
 296                 break;
 297         }
 298
 299         writel(mod, priv->addr + I2SMOD);
 300 }
 301
 302 /* Read bit-clock of I2S (in multiples of LRCLK) */
 303 static inline unsigned get_bfs(struct i2s_dai *i2s)
 304 {
 305         struct samsung_i2s_priv *priv = i2s->priv;
 306         u32 bfs;
 307
 308         bfs = readl(priv->addr + I2SMOD) >> priv->variant_regs->bfs_off;
 309         bfs &= priv->variant_regs->bfs_mask;
 310
 311         switch (bfs) {
 312         case 8: return 256;
 313         case 7: return 192;
 314         case 6: return 128;
 315         case 5: return 96;
 316         case 4: return 64;
 317         case 3: return 24;
 318         case 2: return 16;
 319         case 1: return 48;
 320         default: return 32;
 321         }
 322 }
 323
 324 /* Write bit-clock of I2S (in multiples of LRCLK) */
 325 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
 326 {
 327         struct samsung_i2s_priv *priv = i2s->priv;
 328         u32 mod = readl(priv->addr + I2SMOD);
 329         int tdm = priv->quirks & QUIRK_SUPPORTS_TDM;
 330         int bfs_shift = priv->variant_regs->bfs_off;
 331
 332         /* Non-TDM I2S controllers do not support BCLK > 48 * FS */
 333         if (!tdm && bfs > 48) {
 334                 dev_err(&i2s->pdev->dev, "Unsupported BCLK divider\n");
 335                 return;
 336         }
 337
 338         mod &= ~(priv->variant_regs->bfs_mask << bfs_shift);
 339
 340         switch (bfs) {
 341         case 48:
 342                 mod |= (MOD_BCLK_48FS << bfs_shift);
 343                 break;
 344         case 32:
 345                 mod |= (MOD_BCLK_32FS << bfs_shift);
 346                 break;
 347         case 24:
 348                 mod |= (MOD_BCLK_24FS << bfs_shift);
 349                 break;
 350         case 16:
 351                 mod |= (MOD_BCLK_16FS << bfs_shift);
 352                 break;
 353         case 64:
 354                 mod |= (EXYNOS5420_MOD_BCLK_64FS << bfs_shift);
 355                 break;
 356         case 96:
 357                 mod |= (EXYNOS5420_MOD_BCLK_96FS << bfs_shift);
 358                 break;
 359         case 128:
 360                 mod |= (EXYNOS5420_MOD_BCLK_128FS << bfs_shift);
 361                 break;
 362         case 192:
 363                 mod |= (EXYNOS5420_MOD_BCLK_192FS << bfs_shift);
 364                 break;
 365         case 256:
 366                 mod |= (EXYNOS5420_MOD_BCLK_256FS << bfs_shift);
 367                 break;
 368         default:
 369                 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
 370                 return;
 371         }
 372
 373         writel(mod, priv->addr + I2SMOD);
 374 }
 375
 376 /* Sample size */
 377 static inline int get_blc(struct i2s_dai *i2s)
 378 {
 379         int blc = readl(i2s->priv->addr + I2SMOD);
 380
 381         blc = (blc >> 13) & 0x3;
 382
 383         switch (blc) {
 384         case 2: return 24;
 385         case 1: return 8;
 386         default: return 16;
 387         }
 388 }
 389
 390 /* TX channel control */
 391 static void i2s_txctrl(struct i2s_dai *i2s, int on)
 392 {
 393         struct samsung_i2s_priv *priv = i2s->priv;
 394         void __iomem *addr = priv->addr;
 395         int txr_off = priv->variant_regs->txr_off;
 396         u32 con = readl(addr + I2SCON);
 397         u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off);
 398
 399         if (on) {
 400                 con |= CON_ACTIVE;
 401                 con &= ~CON_TXCH_PAUSE;
 402
 403                 if (is_secondary(i2s)) {
 404                         con |= CON_TXSDMA_ACTIVE;
 405                         con &= ~CON_TXSDMA_PAUSE;
 406                 } else {
 407                         con |= CON_TXDMA_ACTIVE;
 408                         con &= ~CON_TXDMA_PAUSE;
 409                 }
 410
 411                 if (any_rx_active(i2s))
 412                         mod |= 2 << txr_off;
 413                 else
 414                         mod |= 0 << txr_off;
 415         } else {
 416                 if (is_secondary(i2s)) {
 417                         con |=  CON_TXSDMA_PAUSE;
 418                         con &= ~CON_TXSDMA_ACTIVE;
 419                 } else {
 420                         con |=  CON_TXDMA_PAUSE;
 421                         con &= ~CON_TXDMA_ACTIVE;
 422                 }
 423
 424                 if (other_tx_active(i2s)) {
 425                         writel(con, addr + I2SCON);
 426                         return;
 427                 }
 428
 429                 con |=  CON_TXCH_PAUSE;
 430
 431                 if (any_rx_active(i2s))
 432                         mod |= 1 << txr_off;
 433                 else
 434                         con &= ~CON_ACTIVE;
 435         }
 436
 437         writel(mod, addr + I2SMOD);
 438         writel(con, addr + I2SCON);
 439 }
 440
 441 /* RX Channel Control */
 442 static void i2s_rxctrl(struct i2s_dai *i2s, int on)
 443 {
 444         struct samsung_i2s_priv *priv = i2s->priv;
 445         void __iomem *addr = priv->addr;
 446         int txr_off = priv->variant_regs->txr_off;
 447         u32 con = readl(addr + I2SCON);
 448         u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off);
 449
 450         if (on) {
 451                 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
 452                 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
 453
 454                 if (any_tx_active(i2s))
 455                         mod |= 2 << txr_off;
 456                 else
 457                         mod |= 1 << txr_off;
 458         } else {
 459                 con |=  CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
 460                 con &= ~CON_RXDMA_ACTIVE;
 461
 462                 if (any_tx_active(i2s))
 463                         mod |= 0 << txr_off;
 464                 else
 465                         con &= ~CON_ACTIVE;
 466         }
 467
 468         writel(mod, addr + I2SMOD);
 469         writel(con, addr + I2SCON);
 470 }
 471
 472 /* Flush FIFO of an interface */
 473 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
 474 {
 475         void __iomem *fic;
 476         u32 val;
 477
 478         if (!i2s)
 479                 return;
 480
 481         if (is_secondary(i2s))
 482                 fic = i2s->priv->addr + I2SFICS;
 483         else
 484                 fic = i2s->priv->addr + I2SFIC;
 485
 486         /* Flush the FIFO */
 487         writel(readl(fic) | flush, fic);
 488
 489         /* Be patient */
 490         val = msecs_to_loops(1) / 1000; /* 1 usec */
 491         while (--val)
 492                 cpu_relax();
 493
 494         writel(readl(fic) & ~flush, fic);
 495 }
 496
 497 static int i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id, unsigned int rfs,
 498                           int dir)
 499 {
 500         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 501         struct i2s_dai *i2s = to_info(dai);
 502         struct i2s_dai *other = get_other_dai(i2s);
 503         const struct samsung_i2s_variant_regs *i2s_regs = priv->variant_regs;
 504         unsigned int cdcon_mask = 1 << i2s_regs->cdclkcon_off;
 505         unsigned int rsrc_mask = 1 << i2s_regs->rclksrc_off;
 506         u32 mod, mask, val = 0;
 507         unsigned long flags;
 508         int ret = 0;
 509
 510         pm_runtime_get_sync(dai->dev);
 511
 512         spin_lock_irqsave(&priv->lock, flags);
 513         mod = readl(priv->addr + I2SMOD);
 514         spin_unlock_irqrestore(&priv->lock, flags);
 515
 516         switch (clk_id) {
 517         case SAMSUNG_I2S_OPCLK:
 518                 mask = MOD_OPCLK_MASK;
 519                 val = (dir << MOD_OPCLK_SHIFT) & MOD_OPCLK_MASK;
 520                 break;
 521         case SAMSUNG_I2S_CDCLK:
 522                 mask = 1 << i2s_regs->cdclkcon_off;
 523                 /* Shouldn't matter in GATING(CLOCK_IN) mode */
 524                 if (dir == SND_SOC_CLOCK_IN)
 525                         rfs = 0;
 526
 527                 if ((rfs && other && other->rfs && (other->rfs != rfs)) ||
 528                                 (any_active(i2s) &&
 529                                 (((dir == SND_SOC_CLOCK_IN)
 530                                         && !(mod & cdcon_mask)) ||
 531                                 ((dir == SND_SOC_CLOCK_OUT)
 532                                         && (mod & cdcon_mask))))) {
 533                         dev_err(&i2s->pdev->dev,
 534                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 535                         ret = -EAGAIN;
 536                         goto err;
 537                 }
 538
 539                 if (dir == SND_SOC_CLOCK_IN)
 540                         val = 1 << i2s_regs->cdclkcon_off;
 541
 542                 i2s->rfs = rfs;
 543                 break;
 544
 545         case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
 546         case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
 547                 mask = 1 << i2s_regs->rclksrc_off;
 548
 549                 if ((priv->quirks & QUIRK_NO_MUXPSR)
 550                                 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
 551                         clk_id = 0;
 552                 else
 553                         clk_id = 1;
 554
 555                 if (!any_active(i2s)) {
 556                         if (priv->op_clk && !IS_ERR(priv->op_clk)) {
 557                                 if ((clk_id && !(mod & rsrc_mask)) ||
 558                                         (!clk_id && (mod & rsrc_mask))) {
 559                                         clk_disable_unprepare(priv->op_clk);
 560                                         clk_put(priv->op_clk);
 561                                 } else {
 562                                         priv->rclk_srcrate =
 563                                                 clk_get_rate(priv->op_clk);
 564                                         goto done;
 565                                 }
 566                         }
 567
 568                         if (clk_id)
 569                                 priv->op_clk = clk_get(&i2s->pdev->dev,
 570                                                 "i2s_opclk1");
 571                         else
 572                                 priv->op_clk = clk_get(&i2s->pdev->dev,
 573                                                 "i2s_opclk0");
 574
 575                         if (WARN_ON(IS_ERR(priv->op_clk))) {
 576                                 ret = PTR_ERR(priv->op_clk);
 577                                 priv->op_clk = NULL;
 578                                 goto err;
 579                         }
 580
 581                         ret = clk_prepare_enable(priv->op_clk);
 582                         if (ret) {
 583                                 clk_put(priv->op_clk);
 584                                 priv->op_clk = NULL;
 585                                 goto err;
 586                         }
 587                         priv->rclk_srcrate = clk_get_rate(priv->op_clk);
 588
 589                 } else if ((!clk_id && (mod & rsrc_mask))
 590                                 || (clk_id && !(mod & rsrc_mask))) {
 591                         dev_err(&i2s->pdev->dev,
 592                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 593                         ret = -EAGAIN;
 594                         goto err;
 595                 } else {
 596                         /* Call can't be on the active DAI */
 597                         goto done;
 598                 }
 599
 600                 if (clk_id == 1)
 601                         val = 1 << i2s_regs->rclksrc_off;
 602                 break;
 603         default:
 604                 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
 605                 ret = -EINVAL;
 606                 goto err;
 607         }
 608
 609         spin_lock_irqsave(&priv->lock, flags);
 610         mod = readl(priv->addr + I2SMOD);
 611         mod = (mod & ~mask) | val;
 612         writel(mod, priv->addr + I2SMOD);
 613         spin_unlock_irqrestore(&priv->lock, flags);
 614 done:
 615         pm_runtime_put(dai->dev);
 616
 617         return 0;
 618 err:
 619         pm_runtime_put(dai->dev);
 620         return ret;
 621 }
 622
 623 static int i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 624 {
 625         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 626         struct i2s_dai *i2s = to_info(dai);
 627         int lrp_shift, sdf_shift, sdf_mask, lrp_rlow, mod_slave;
 628         u32 mod, tmp = 0;
 629         unsigned long flags;
 630
 631         lrp_shift = priv->variant_regs->lrp_off;
 632         sdf_shift = priv->variant_regs->sdf_off;
 633         mod_slave = 1 << priv->variant_regs->mss_off;
 634
 635         sdf_mask = MOD_SDF_MASK << sdf_shift;
 636         lrp_rlow = MOD_LR_RLOW << lrp_shift;
 637
 638         /* Format is priority */
 639         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 640         case SND_SOC_DAIFMT_RIGHT_J:
 641                 tmp |= lrp_rlow;
 642                 tmp |= (MOD_SDF_MSB << sdf_shift);
 643                 break;
 644         case SND_SOC_DAIFMT_LEFT_J:
 645                 tmp |= lrp_rlow;
 646                 tmp |= (MOD_SDF_LSB << sdf_shift);
 647                 break;
 648         case SND_SOC_DAIFMT_I2S:
 649                 tmp |= (MOD_SDF_IIS << sdf_shift);
 650                 break;
 651         default:
 652                 dev_err(&i2s->pdev->dev, "Format not supported\n");
 653                 return -EINVAL;
 654         }
 655
 656         /*
 657          * INV flag is relative to the FORMAT flag - if set it simply
 658          * flips the polarity specified by the Standard
 659          */
 660         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 661         case SND_SOC_DAIFMT_NB_NF:
 662                 break;
 663         case SND_SOC_DAIFMT_NB_IF:
 664                 if (tmp & lrp_rlow)
 665                         tmp &= ~lrp_rlow;
 666                 else
 667                         tmp |= lrp_rlow;
 668                 break;
 669         default:
 670                 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
 671                 return -EINVAL;
 672         }
 673
 674         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 675         case SND_SOC_DAIFMT_CBM_CFM:
 676                 tmp |= mod_slave;
 677                 break;
 678         case SND_SOC_DAIFMT_CBS_CFS:
 679                 /*
 680                  * Set default source clock in Master mode, only when the
 681                  * CLK_I2S_RCLK_SRC clock is not exposed so we ensure any
 682                  * clock configuration assigned in DT is not overwritten.
 683                  */
 684                 if (priv->rclk_srcrate == 0 && priv->clk_data.clks == NULL)
 685                         i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
 686                                                         0, SND_SOC_CLOCK_IN);
 687                 break;
 688         default:
 689                 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
 690                 return -EINVAL;
 691         }
 692
 693         pm_runtime_get_sync(dai->dev);
 694         spin_lock_irqsave(&priv->lock, flags);
 695         mod = readl(priv->addr + I2SMOD);
 696         /*
 697          * Don't change the I2S mode if any controller is active on this
 698          * channel.
 699          */
 700         if (any_active(i2s) &&
 701                 ((mod & (sdf_mask | lrp_rlow | mod_slave)) != tmp)) {
 702                 spin_unlock_irqrestore(&priv->lock, flags);
 703                 pm_runtime_put(dai->dev);
 704                 dev_err(&i2s->pdev->dev,
 705                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 706                 return -EAGAIN;
 707         }
 708
 709         mod &= ~(sdf_mask | lrp_rlow | mod_slave);
 710         mod |= tmp;
 711         writel(mod, priv->addr + I2SMOD);
 712         priv->slave_mode = (mod & mod_slave);
 713         spin_unlock_irqrestore(&priv->lock, flags);
 714         pm_runtime_put(dai->dev);
 715
 716         return 0;
 717 }
 718
 719 static int i2s_hw_params(struct snd_pcm_substream *substream,
 720         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 721 {
 722         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 723         struct i2s_dai *i2s = to_info(dai);
 724         u32 mod, mask = 0, val = 0;
 725         struct clk *rclksrc;
 726         unsigned long flags;
 727
 728         WARN_ON(!pm_runtime_active(dai->dev));
 729
 730         if (!is_secondary(i2s))
 731                 mask |= (MOD_DC2_EN | MOD_DC1_EN);
 732
 733         switch (params_channels(params)) {
 734         case 6:
 735                 val |= MOD_DC2_EN;
 736                 /* Fall through */
 737         case 4:
 738                 val |= MOD_DC1_EN;
 739                 break;
 740         case 2:
 741                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 742                         i2s->dma_playback.addr_width = 4;
 743                 else
 744                         i2s->dma_capture.addr_width = 4;
 745                 break;
 746         case 1:
 747                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 748                         i2s->dma_playback.addr_width = 2;
 749                 else
 750                         i2s->dma_capture.addr_width = 2;
 751
 752                 break;
 753         default:
 754                 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
 755                                 params_channels(params));
 756                 return -EINVAL;
 757         }
 758
 759         if (is_secondary(i2s))
 760                 mask |= MOD_BLCS_MASK;
 761         else
 762                 mask |= MOD_BLCP_MASK;
 763
 764         if (is_manager(i2s))
 765                 mask |= MOD_BLC_MASK;
 766
 767         switch (params_width(params)) {
 768         case 8:
 769                 if (is_secondary(i2s))
 770                         val |= MOD_BLCS_8BIT;
 771                 else
 772                         val |= MOD_BLCP_8BIT;
 773                 if (is_manager(i2s))
 774                         val |= MOD_BLC_8BIT;
 775                 break;
 776         case 16:
 777                 if (is_secondary(i2s))
 778                         val |= MOD_BLCS_16BIT;
 779                 else
 780                         val |= MOD_BLCP_16BIT;
 781                 if (is_manager(i2s))
 782                         val |= MOD_BLC_16BIT;
 783                 break;
 784         case 24:
 785                 if (is_secondary(i2s))
 786                         val |= MOD_BLCS_24BIT;
 787                 else
 788                         val |= MOD_BLCP_24BIT;
 789                 if (is_manager(i2s))
 790                         val |= MOD_BLC_24BIT;
 791                 break;
 792         default:
 793                 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
 794                                 params_format(params));
 795                 return -EINVAL;
 796         }
 797
 798         spin_lock_irqsave(&priv->lock, flags);
 799         mod = readl(priv->addr + I2SMOD);
 800         mod = (mod & ~mask) | val;
 801         writel(mod, priv->addr + I2SMOD);
 802         spin_unlock_irqrestore(&priv->lock, flags);
 803
 804         snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
 805
 806         i2s->frmclk = params_rate(params);
 807
 808         rclksrc = priv->clk_table[CLK_I2S_RCLK_SRC];
 809         if (rclksrc && !IS_ERR(rclksrc))
 810                 priv->rclk_srcrate = clk_get_rate(rclksrc);
 811
 812         return 0;
 813 }
 814
 815 /* We set constraints on the substream according to the version of I2S */
 816 static int i2s_startup(struct snd_pcm_substream *substream,
 817           struct snd_soc_dai *dai)
 818 {
 819         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 820         struct i2s_dai *i2s = to_info(dai);
 821         struct i2s_dai *other = get_other_dai(i2s);
 822         unsigned long flags;
 823
 824         pm_runtime_get_sync(dai->dev);
 825
 826         spin_lock_irqsave(&priv->pcm_lock, flags);
 827
 828         i2s->mode |= DAI_OPENED;
 829
 830         if (is_manager(other))
 831                 i2s->mode &= ~DAI_MANAGER;
 832         else
 833                 i2s->mode |= DAI_MANAGER;
 834
 835         if (!any_active(i2s) && (priv->quirks & QUIRK_NEED_RSTCLR))
 836                 writel(CON_RSTCLR, i2s->priv->addr + I2SCON);
 837
 838         spin_unlock_irqrestore(&priv->pcm_lock, flags);
 839
 840         return 0;
 841 }
 842
 843 static void i2s_shutdown(struct snd_pcm_substream *substream,
 844         struct snd_soc_dai *dai)
 845 {
 846         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 847         struct i2s_dai *i2s = to_info(dai);
 848         struct i2s_dai *other = get_other_dai(i2s);
 849         unsigned long flags;
 850
 851         spin_lock_irqsave(&priv->pcm_lock, flags);
 852
 853         i2s->mode &= ~DAI_OPENED;
 854         i2s->mode &= ~DAI_MANAGER;
 855
 856         if (is_opened(other))
 857                 other->mode |= DAI_MANAGER;
 858
 859         /* Reset any constraint on RFS and BFS */
 860         i2s->rfs = 0;
 861         i2s->bfs = 0;
 862
 863         spin_unlock_irqrestore(&priv->pcm_lock, flags);
 864
 865         pm_runtime_put(dai->dev);
 866 }
 867
 868 static int config_setup(struct i2s_dai *i2s)
 869 {
 870         struct samsung_i2s_priv *priv = i2s->priv;
 871         struct i2s_dai *other = get_other_dai(i2s);
 872         unsigned rfs, bfs, blc;
 873         u32 psr;
 874
 875         blc = get_blc(i2s);
 876
 877         bfs = i2s->bfs;
 878
 879         if (!bfs && other)
 880                 bfs = other->bfs;
 881
 882         /* Select least possible multiple(2) if no constraint set */
 883         if (!bfs)
 884                 bfs = blc * 2;
 885
 886         rfs = i2s->rfs;
 887
 888         if (!rfs && other)
 889                 rfs = other->rfs;
 890
 891         if ((rfs == 256 || rfs == 512) && (blc == 24)) {
 892                 dev_err(&i2s->pdev->dev,
 893                         "%d-RFS not supported for 24-blc\n", rfs);
 894                 return -EINVAL;
 895         }
 896
 897         if (!rfs) {
 898                 if (bfs == 16 || bfs == 32)
 899                         rfs = 256;
 900                 else
 901                         rfs = 384;
 902         }
 903
 904         /* If already setup and running */
 905         if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
 906                 dev_err(&i2s->pdev->dev,
 907                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 908                 return -EAGAIN;
 909         }
 910
 911         set_bfs(i2s, bfs);
 912         set_rfs(i2s, rfs);
 913
 914         /* Don't bother with PSR in Slave mode */
 915         if (priv->slave_mode)
 916                 return 0;
 917
 918         if (!(priv->quirks & QUIRK_NO_MUXPSR)) {
 919                 psr = priv->rclk_srcrate / i2s->frmclk / rfs;
 920                 writel(((psr - 1) << 8) | PSR_PSREN, priv->addr + I2SPSR);
 921                 dev_dbg(&i2s->pdev->dev,
 922                         "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
 923                                 priv->rclk_srcrate, psr, rfs, bfs);
 924         }
 925
 926         return 0;
 927 }
 928
 929 static int i2s_trigger(struct snd_pcm_substream *substream,
 930         int cmd, struct snd_soc_dai *dai)
 931 {
 932         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
 933         int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 934         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 935         struct i2s_dai *i2s = to_info(asoc_rtd_to_cpu(rtd, 0));
 936         unsigned long flags;
 937
 938         switch (cmd) {
 939         case SNDRV_PCM_TRIGGER_START:
 940         case SNDRV_PCM_TRIGGER_RESUME:
 941         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 942                 pm_runtime_get_sync(dai->dev);
 943                 spin_lock_irqsave(&priv->lock, flags);
 944
 945                 if (config_setup(i2s)) {
 946                         spin_unlock_irqrestore(&priv->lock, flags);
 947                         return -EINVAL;
 948                 }
 949
 950                 if (capture)
 951                         i2s_rxctrl(i2s, 1);
 952                 else
 953                         i2s_txctrl(i2s, 1);
 954
 955                 spin_unlock_irqrestore(&priv->lock, flags);
 956                 break;
 957         case SNDRV_PCM_TRIGGER_STOP:
 958         case SNDRV_PCM_TRIGGER_SUSPEND:
 959         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 960                 spin_lock_irqsave(&priv->lock, flags);
 961
 962                 if (capture) {
 963                         i2s_rxctrl(i2s, 0);
 964                         i2s_fifo(i2s, FIC_RXFLUSH);
 965                 } else {
 966                         i2s_txctrl(i2s, 0);
 967                         i2s_fifo(i2s, FIC_TXFLUSH);
 968                 }
 969
 970                 spin_unlock_irqrestore(&priv->lock, flags);
 971                 pm_runtime_put(dai->dev);
 972                 break;
 973         }
 974
 975         return 0;
 976 }
 977
 978 static int i2s_set_clkdiv(struct snd_soc_dai *dai,
 979         int div_id, int div)
 980 {
 981         struct i2s_dai *i2s = to_info(dai);
 982         struct i2s_dai *other = get_other_dai(i2s);
 983
 984         switch (div_id) {
 985         case SAMSUNG_I2S_DIV_BCLK:
 986                 pm_runtime_get_sync(dai->dev);
 987                 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
 988                         || (other && other->bfs && (other->bfs != div))) {
 989                         pm_runtime_put(dai->dev);
 990                         dev_err(&i2s->pdev->dev,
 991                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 992                         return -EAGAIN;
 993                 }
 994                 i2s->bfs = div;
 995                 pm_runtime_put(dai->dev);
 996                 break;
 997         default:
 998                 dev_err(&i2s->pdev->dev,
 999                         "Invalid clock divider(%d)\n", div_id);
1000                 return -EINVAL;
1001         }
1002
1003         return 0;
1004 }
1005
1006 static snd_pcm_sframes_t
1007 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
1008 {
1009         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
1010         struct i2s_dai *i2s = to_info(dai);
1011         u32 reg = readl(priv->addr + I2SFIC);
1012         snd_pcm_sframes_t delay;
1013
1014         WARN_ON(!pm_runtime_active(dai->dev));
1015
1016         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1017                 delay = FIC_RXCOUNT(reg);
1018         else if (is_secondary(i2s))
1019                 delay = FICS_TXCOUNT(readl(priv->addr + I2SFICS));
1020         else
1021                 delay = (reg >> priv->variant_regs->ftx0cnt_off) & 0x7f;
1022
1023         return delay;
1024 }
1025
1026 #ifdef CONFIG_PM
1027 static int i2s_suspend(struct snd_soc_component *component)
1028 {
1029         return pm_runtime_force_suspend(component->dev);
1030 }
1031
1032 static int i2s_resume(struct snd_soc_component *component)
1033 {
1034         return pm_runtime_force_resume(component->dev);
1035 }
1036 #else
1037 #define i2s_suspend NULL
1038 #define i2s_resume  NULL
1039 #endif
1040
1041 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
1042 {
1043         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
1044         struct i2s_dai *i2s = to_info(dai);
1045         struct i2s_dai *other = get_other_dai(i2s);
1046         unsigned long flags;
1047
1048         pm_runtime_get_sync(dai->dev);
1049
1050         if (is_secondary(i2s)) {
1051                 /* If this is probe on the secondary DAI */
1052                 snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, NULL);
1053         } else {
1054                 snd_soc_dai_init_dma_data(dai, &i2s->dma_playback,
1055                                           &i2s->dma_capture);
1056
1057                 if (priv->quirks & QUIRK_NEED_RSTCLR)
1058                         writel(CON_RSTCLR, priv->addr + I2SCON);
1059
1060                 if (priv->quirks & QUIRK_SUPPORTS_IDMA)
1061                         idma_reg_addr_init(priv->addr,
1062                                            other->idma_playback.addr);
1063         }
1064
1065         /* Reset any constraint on RFS and BFS */
1066         i2s->rfs = 0;
1067         i2s->bfs = 0;
1068
1069         spin_lock_irqsave(&priv->lock, flags);
1070         i2s_txctrl(i2s, 0);
1071         i2s_rxctrl(i2s, 0);
1072         i2s_fifo(i2s, FIC_TXFLUSH);
1073         i2s_fifo(other, FIC_TXFLUSH);
1074         i2s_fifo(i2s, FIC_RXFLUSH);
1075         spin_unlock_irqrestore(&priv->lock, flags);
1076
1077         /* Gate CDCLK by default */
1078         if (!is_opened(other))
1079                 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
1080                                 0, SND_SOC_CLOCK_IN);
1081         pm_runtime_put(dai->dev);
1082
1083         return 0;
1084 }
1085
1086 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
1087 {
1088         struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
1089         struct i2s_dai *i2s = to_info(dai);
1090         unsigned long flags;
1091
1092         pm_runtime_get_sync(dai->dev);
1093
1094         if (!is_secondary(i2s)) {
1095                 if (priv->quirks & QUIRK_NEED_RSTCLR) {
1096                         spin_lock_irqsave(&priv->lock, flags);
1097                         writel(0, priv->addr + I2SCON);
1098                         spin_unlock_irqrestore(&priv->lock, flags);
1099                 }
1100         }
1101
1102         pm_runtime_put(dai->dev);
1103
1104         return 0;
1105 }
1106
1107 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = {
1108         .trigger = i2s_trigger,
1109         .hw_params = i2s_hw_params,
1110         .set_fmt = i2s_set_fmt,
1111         .set_clkdiv = i2s_set_clkdiv,
1112         .set_sysclk = i2s_set_sysclk,
1113         .startup = i2s_startup,
1114         .shutdown = i2s_shutdown,
1115         .delay = i2s_delay,
1116 };
1117
1118 static const struct snd_soc_dapm_widget samsung_i2s_widgets[] = {
1119         /* Backend DAI  */
1120         SND_SOC_DAPM_AIF_OUT("Mixer DAI TX", NULL, 0, SND_SOC_NOPM, 0, 0),
1121         SND_SOC_DAPM_AIF_IN("Mixer DAI RX", NULL, 0, SND_SOC_NOPM, 0, 0),
1122
1123         /* Playback Mixer */
1124         SND_SOC_DAPM_MIXER("Playback Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
1125 };
1126
1127 static const struct snd_soc_dapm_route samsung_i2s_dapm_routes[] = {
1128         { "Playback Mixer", NULL, "Primary Playback" },
1129         { "Playback Mixer", NULL, "Secondary Playback" },
1130
1131         { "Mixer DAI TX", NULL, "Playback Mixer" },
1132         { "Primary Capture", NULL, "Mixer DAI RX" },
1133 };
1134
1135 static const struct snd_soc_component_driver samsung_i2s_component = {
1136         .name = "samsung-i2s",
1137
1138         .dapm_widgets = samsung_i2s_widgets,
1139         .num_dapm_widgets = ARRAY_SIZE(samsung_i2s_widgets),
1140
1141         .dapm_routes = samsung_i2s_dapm_routes,
1142         .num_dapm_routes = ARRAY_SIZE(samsung_i2s_dapm_routes),
1143
1144         .suspend = i2s_suspend,
1145         .resume = i2s_resume,
1146 };
1147
1148 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
1149                           SNDRV_PCM_FMTBIT_S24_LE)
1150
1151 static int i2s_alloc_dais(struct samsung_i2s_priv *priv,
1152                           const struct samsung_i2s_dai_data *i2s_dai_data,
1153                           int num_dais)
1154 {
1155         static const char *dai_names[] = { "samsung-i2s", "samsung-i2s-sec" };
1156         static const char *stream_names[] = { "Primary Playback",
1157                                               "Secondary Playback" };
1158         struct snd_soc_dai_driver *dai_drv;
1159         struct i2s_dai *dai;
1160         int i;
1161
1162         priv->dai = devm_kcalloc(&priv->pdev->dev, num_dais,
1163                                      sizeof(*dai), GFP_KERNEL);
1164         if (!priv->dai)
1165                 return -ENOMEM;
1166
1167         priv->dai_drv = devm_kcalloc(&priv->pdev->dev, num_dais,
1168                                      sizeof(*dai_drv), GFP_KERNEL);
1169         if (!priv->dai_drv)
1170                 return -ENOMEM;
1171
1172         for (i = 0; i < num_dais; i++) {
1173                 dai_drv = &priv->dai_drv[i];
1174
1175                 dai_drv->probe = samsung_i2s_dai_probe;
1176                 dai_drv->remove = samsung_i2s_dai_remove;
1177
1178                 dai_drv->symmetric_rates = 1;
1179                 dai_drv->ops = &samsung_i2s_dai_ops;
1180
1181                 dai_drv->playback.channels_min = 1;
1182                 dai_drv->playback.channels_max = 2;
1183                 dai_drv->playback.rates = i2s_dai_data->pcm_rates;
1184                 dai_drv->playback.formats = SAMSUNG_I2S_FMTS;
1185                 dai_drv->playback.stream_name = stream_names[i];
1186
1187                 dai_drv->id = i + 1;
1188                 dai_drv->name = dai_names[i];
1189
1190                 priv->dai[i].drv = &priv->dai_drv[i];
1191                 priv->dai[i].pdev = priv->pdev;
1192         }
1193
1194         /* Initialize capture only for the primary DAI */
1195         dai_drv = &priv->dai_drv[SAMSUNG_I2S_ID_PRIMARY - 1];
1196
1197         dai_drv->capture.channels_min = 1;
1198         dai_drv->capture.channels_max = 2;
1199         dai_drv->capture.rates = i2s_dai_data->pcm_rates;
1200         dai_drv->capture.formats = SAMSUNG_I2S_FMTS;
1201         dai_drv->capture.stream_name = "Primary Capture";
1202
1203         return 0;
1204 }
1205
1206 #ifdef CONFIG_PM
1207 static int i2s_runtime_suspend(struct device *dev)
1208 {
1209         struct samsung_i2s_priv *priv = dev_get_drvdata(dev);
1210
1211         priv->suspend_i2smod = readl(priv->addr + I2SMOD);
1212         priv->suspend_i2scon = readl(priv->addr + I2SCON);
1213         priv->suspend_i2spsr = readl(priv->addr + I2SPSR);
1214
1215         if (priv->op_clk)
1216                 clk_disable_unprepare(priv->op_clk);
1217         clk_disable_unprepare(priv->clk);
1218
1219         return 0;
1220 }
1221
1222 static int i2s_runtime_resume(struct device *dev)
1223 {
1224         struct samsung_i2s_priv *priv = dev_get_drvdata(dev);
1225         int ret;
1226
1227         ret = clk_prepare_enable(priv->clk);
1228         if (ret)
1229                 return ret;
1230
1231         if (priv->op_clk) {
1232                 ret = clk_prepare_enable(priv->op_clk);
1233                 if (ret) {
1234                         clk_disable_unprepare(priv->clk);
1235                         return ret;
1236                 }
1237         }
1238
1239         writel(priv->suspend_i2scon, priv->addr + I2SCON);
1240         writel(priv->suspend_i2smod, priv->addr + I2SMOD);
1241         writel(priv->suspend_i2spsr, priv->addr + I2SPSR);
1242
1243         return 0;
1244 }
1245 #endif /* CONFIG_PM */
1246
1247 static void i2s_unregister_clocks(struct samsung_i2s_priv *priv)
1248 {
1249         int i;
1250
1251         for (i = 0; i < priv->clk_data.clk_num; i++) {
1252                 if (!IS_ERR(priv->clk_table[i]))
1253                         clk_unregister(priv->clk_table[i]);
1254         }
1255 }
1256
1257 static void i2s_unregister_clock_provider(struct samsung_i2s_priv *priv)
1258 {
1259         of_clk_del_provider(priv->pdev->dev.of_node);
1260         i2s_unregister_clocks(priv);
1261 }
1262
1263
1264 static int i2s_register_clock_provider(struct samsung_i2s_priv *priv)
1265 {
1266
1267         const char * const i2s_clk_desc[] = { "cdclk", "rclk_src", "prescaler" };
1268         const char *clk_name[2] = { "i2s_opclk0", "i2s_opclk1" };
1269         const char *p_names[2] = { NULL };
1270         struct device *dev = &priv->pdev->dev;
1271         const struct samsung_i2s_variant_regs *reg_info = priv->variant_regs;
1272         const char *i2s_clk_name[ARRAY_SIZE(i2s_clk_desc)];
1273         struct clk *rclksrc;
1274         int ret, i;
1275
1276         /* Register the clock provider only if it's expected in the DTB */
1277         if (!of_find_property(dev->of_node, "#clock-cells", NULL))
1278                 return 0;
1279
1280         /* Get the RCLKSRC mux clock parent clock names */
1281         for (i = 0; i < ARRAY_SIZE(p_names); i++) {
1282                 rclksrc = clk_get(dev, clk_name[i]);
1283                 if (IS_ERR(rclksrc))
1284                         continue;
1285                 p_names[i] = __clk_get_name(rclksrc);
1286                 clk_put(rclksrc);
1287         }
1288
1289         for (i = 0; i < ARRAY_SIZE(i2s_clk_desc); i++) {
1290                 i2s_clk_name[i] = devm_kasprintf(dev, GFP_KERNEL, "%s_%s",
1291                                                 dev_name(dev), i2s_clk_desc[i]);
1292                 if (!i2s_clk_name[i])
1293                         return -ENOMEM;
1294         }
1295
1296         if (!(priv->quirks & QUIRK_NO_MUXPSR)) {
1297                 /* Activate the prescaler */
1298                 u32 val = readl(priv->addr + I2SPSR);
1299                 writel(val | PSR_PSREN, priv->addr + I2SPSR);
1300
1301                 priv->clk_table[CLK_I2S_RCLK_SRC] = clk_register_mux(dev,
1302                                 i2s_clk_name[CLK_I2S_RCLK_SRC], p_names,
1303                                 ARRAY_SIZE(p_names),
1304                                 CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT,
1305                                 priv->addr + I2SMOD, reg_info->rclksrc_off,
1306                                 1, 0, &priv->lock);
1307
1308                 priv->clk_table[CLK_I2S_RCLK_PSR] = clk_register_divider(dev,
1309                                 i2s_clk_name[CLK_I2S_RCLK_PSR],
1310                                 i2s_clk_name[CLK_I2S_RCLK_SRC],
1311                                 CLK_SET_RATE_PARENT,
1312                                 priv->addr + I2SPSR, 8, 6, 0, &priv->lock);
1313
1314                 p_names[0] = i2s_clk_name[CLK_I2S_RCLK_PSR];
1315                 priv->clk_data.clk_num = 2;
1316         }
1317
1318         priv->clk_table[CLK_I2S_CDCLK] = clk_register_gate(dev,
1319                                 i2s_clk_name[CLK_I2S_CDCLK], p_names[0],
1320                                 CLK_SET_RATE_PARENT,
1321                                 priv->addr + I2SMOD, reg_info->cdclkcon_off,
1322                                 CLK_GATE_SET_TO_DISABLE, &priv->lock);
1323
1324         priv->clk_data.clk_num += 1;
1325         priv->clk_data.clks = priv->clk_table;
1326
1327         ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1328                                   &priv->clk_data);
1329         if (ret < 0) {
1330                 dev_err(dev, "failed to add clock provider: %d\n", ret);
1331                 i2s_unregister_clocks(priv);
1332         }
1333
1334         return ret;
1335 }
1336
1337 /* Create platform device for the secondary PCM */
1338 static int i2s_create_secondary_device(struct samsung_i2s_priv *priv)
1339 {
1340         struct platform_device *pdev_sec;
1341         const char *devname;
1342         int ret;
1343
1344         devname = devm_kasprintf(&priv->pdev->dev, GFP_KERNEL, "%s-sec",
1345                                  dev_name(&priv->pdev->dev));
1346         if (!devname)
1347                 return -ENOMEM;
1348
1349         pdev_sec = platform_device_alloc(devname, -1);
1350         if (!pdev_sec)
1351                 return -ENOMEM;
1352
1353         pdev_sec->driver_override = kstrdup("samsung-i2s", GFP_KERNEL);
1354
1355         ret = platform_device_add(pdev_sec);
1356         if (ret < 0) {
1357                 platform_device_put(pdev_sec);
1358                 return ret;
1359         }
1360
1361         ret = device_attach(&pdev_sec->dev);
1362         if (ret <= 0) {
1363                 platform_device_unregister(priv->pdev_sec);
1364                 dev_info(&pdev_sec->dev, "device_attach() failed\n");
1365                 return ret;
1366         }
1367
1368         priv->pdev_sec = pdev_sec;
1369
1370         return 0;
1371 }
1372
1373 static void i2s_delete_secondary_device(struct samsung_i2s_priv *priv)
1374 {
1375         platform_device_unregister(priv->pdev_sec);
1376         priv->pdev_sec = NULL;
1377 }
1378
1379 static int samsung_i2s_probe(struct platform_device *pdev)
1380 {
1381         struct i2s_dai *pri_dai, *sec_dai = NULL;
1382         struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
1383         u32 regs_base, idma_addr = 0;
1384         struct device_node *np = pdev->dev.of_node;
1385         const struct samsung_i2s_dai_data *i2s_dai_data;
1386         const struct platform_device_id *id;
1387         struct samsung_i2s_priv *priv;
1388         struct resource *res;
1389         int num_dais, ret;
1390
1391         if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
1392                 i2s_dai_data = of_device_get_match_data(&pdev->dev);
1393         } else {
1394                 id = platform_get_device_id(pdev);
1395
1396                 /* Nothing to do if it is the secondary device probe */
1397                 if (!id)
1398                         return 0;
1399
1400                 i2s_dai_data = (struct samsung_i2s_dai_data *)id->driver_data;
1401         }
1402
1403         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1404         if (!priv)
1405                 return -ENOMEM;
1406
1407         if (np) {
1408                 priv->quirks = i2s_dai_data->quirks;
1409         } else {
1410                 if (!i2s_pdata) {
1411                         dev_err(&pdev->dev, "Missing platform data\n");
1412                         return -EINVAL;
1413                 }
1414                 priv->quirks = i2s_pdata->type.quirks;
1415         }
1416
1417         num_dais = (priv->quirks & QUIRK_SEC_DAI) ? 2 : 1;
1418         priv->pdev = pdev;
1419         priv->variant_regs = i2s_dai_data->i2s_variant_regs;
1420
1421         ret = i2s_alloc_dais(priv, i2s_dai_data, num_dais);
1422         if (ret < 0)
1423                 return ret;
1424
1425         pri_dai = &priv->dai[SAMSUNG_I2S_ID_PRIMARY - 1];
1426
1427         spin_lock_init(&priv->lock);
1428         spin_lock_init(&priv->pcm_lock);
1429
1430         if (!np) {
1431                 pri_dai->dma_playback.filter_data = i2s_pdata->dma_playback;
1432                 pri_dai->dma_capture.filter_data = i2s_pdata->dma_capture;
1433                 pri_dai->filter = i2s_pdata->dma_filter;
1434
1435                 idma_addr = i2s_pdata->type.idma_addr;
1436         } else {
1437                 if (of_property_read_u32(np, "samsung,idma-addr",
1438                                          &idma_addr)) {
1439                         if (priv->quirks & QUIRK_SUPPORTS_IDMA) {
1440                                 dev_info(&pdev->dev, "idma address is not"\
1441                                                 "specified");
1442                         }
1443                 }
1444         }
1445
1446         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1447         priv->addr = devm_ioremap_resource(&pdev->dev, res);
1448         if (IS_ERR(priv->addr))
1449                 return PTR_ERR(priv->addr);
1450
1451         regs_base = res->start;
1452
1453         priv->clk = devm_clk_get(&pdev->dev, "iis");
1454         if (IS_ERR(priv->clk)) {
1455                 dev_err(&pdev->dev, "Failed to get iis clock\n");
1456                 return PTR_ERR(priv->clk);
1457         }
1458
1459         ret = clk_prepare_enable(priv->clk);
1460         if (ret != 0) {
1461                 dev_err(&pdev->dev, "failed to enable clock: %d\n", ret);
1462                 return ret;
1463         }
1464         pri_dai->dma_playback.addr = regs_base + I2STXD;
1465         pri_dai->dma_capture.addr = regs_base + I2SRXD;
1466         pri_dai->dma_playback.chan_name = "tx";
1467         pri_dai->dma_capture.chan_name = "rx";
1468         pri_dai->dma_playback.addr_width = 4;
1469         pri_dai->dma_capture.addr_width = 4;
1470         pri_dai->priv = priv;
1471
1472         if (priv->quirks & QUIRK_PRI_6CHAN)
1473                 pri_dai->drv->playback.channels_max = 6;
1474
1475         ret = samsung_asoc_dma_platform_register(&pdev->dev, pri_dai->filter,
1476                                                  "tx", "rx", NULL);
1477         if (ret < 0)
1478                 goto err_disable_clk;
1479
1480         if (priv->quirks & QUIRK_SEC_DAI) {
1481                 sec_dai = &priv->dai[SAMSUNG_I2S_ID_SECONDARY - 1];
1482
1483                 sec_dai->dma_playback.addr = regs_base + I2STXDS;
1484                 sec_dai->dma_playback.chan_name = "tx-sec";
1485
1486                 if (!np) {
1487                         sec_dai->dma_playback.filter_data = i2s_pdata->dma_play_sec;
1488                         sec_dai->filter = i2s_pdata->dma_filter;
1489                 }
1490
1491                 sec_dai->dma_playback.addr_width = 4;
1492                 sec_dai->idma_playback.addr = idma_addr;
1493                 sec_dai->pri_dai = pri_dai;
1494                 sec_dai->priv = priv;
1495                 pri_dai->sec_dai = sec_dai;
1496
1497                 ret = i2s_create_secondary_device(priv);
1498                 if (ret < 0)
1499                         goto err_disable_clk;
1500
1501                 ret = samsung_asoc_dma_platform_register(&priv->pdev_sec->dev,
1502                                                 sec_dai->filter, "tx-sec", NULL,
1503                                                 &pdev->dev);
1504                 if (ret < 0)
1505                         goto err_del_sec;
1506
1507         }
1508
1509         if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1510                 dev_err(&pdev->dev, "Unable to configure gpio\n");
1511                 ret = -EINVAL;
1512                 goto err_del_sec;
1513         }
1514
1515         dev_set_drvdata(&pdev->dev, priv);
1516
1517         ret = devm_snd_soc_register_component(&pdev->dev,
1518                                         &samsung_i2s_component,
1519                                         priv->dai_drv, num_dais);
1520         if (ret < 0)
1521                 goto err_del_sec;
1522
1523         pm_runtime_set_active(&pdev->dev);
1524         pm_runtime_enable(&pdev->dev);
1525
1526         ret = i2s_register_clock_provider(priv);
1527         if (ret < 0)
1528                 goto err_disable_pm;
1529
1530         priv->op_clk = clk_get_parent(priv->clk_table[CLK_I2S_RCLK_SRC]);
1531
1532         return 0;
1533
1534 err_disable_pm:
1535         pm_runtime_disable(&pdev->dev);
1536 err_del_sec:
1537         i2s_delete_secondary_device(priv);
1538 err_disable_clk:
1539         clk_disable_unprepare(priv->clk);
1540         return ret;
1541 }
1542
1543 static int samsung_i2s_remove(struct platform_device *pdev)
1544 {
1545         struct samsung_i2s_priv *priv = dev_get_drvdata(&pdev->dev);
1546
1547         /* The secondary device has no driver data assigned */
1548         if (!priv)
1549                 return 0;
1550
1551         pm_runtime_get_sync(&pdev->dev);
1552         pm_runtime_disable(&pdev->dev);
1553
1554         i2s_unregister_clock_provider(priv);
1555         i2s_delete_secondary_device(priv);
1556         clk_disable_unprepare(priv->clk);
1557
1558         pm_runtime_put_noidle(&pdev->dev);
1559
1560         return 0;
1561 }
1562
1563 static const struct samsung_i2s_variant_regs i2sv3_regs = {
1564         .bfs_off = 1,
1565         .rfs_off = 3,
1566         .sdf_off = 5,
1567         .txr_off = 8,
1568         .rclksrc_off = 10,
1569         .mss_off = 11,
1570         .cdclkcon_off = 12,
1571         .lrp_off = 7,
1572         .bfs_mask = 0x3,
1573         .rfs_mask = 0x3,
1574         .ftx0cnt_off = 8,
1575 };
1576
1577 static const struct samsung_i2s_variant_regs i2sv6_regs = {
1578         .bfs_off = 0,
1579         .rfs_off = 4,
1580         .sdf_off = 6,
1581         .txr_off = 8,
1582         .rclksrc_off = 10,
1583         .mss_off = 11,
1584         .cdclkcon_off = 12,
1585         .lrp_off = 15,
1586         .bfs_mask = 0xf,
1587         .rfs_mask = 0x3,
1588         .ftx0cnt_off = 8,
1589 };
1590
1591 static const struct samsung_i2s_variant_regs i2sv7_regs = {
1592         .bfs_off = 0,
1593         .rfs_off = 4,
1594         .sdf_off = 7,
1595         .txr_off = 9,
1596         .rclksrc_off = 11,
1597         .mss_off = 12,
1598         .cdclkcon_off = 22,
1599         .lrp_off = 15,
1600         .bfs_mask = 0xf,
1601         .rfs_mask = 0x7,
1602         .ftx0cnt_off = 0,
1603 };
1604
1605 static const struct samsung_i2s_variant_regs i2sv5_i2s1_regs = {
1606         .bfs_off = 0,
1607         .rfs_off = 3,
1608         .sdf_off = 6,
1609         .txr_off = 8,
1610         .rclksrc_off = 10,
1611         .mss_off = 11,
1612         .cdclkcon_off = 12,
1613         .lrp_off = 15,
1614         .bfs_mask = 0x7,
1615         .rfs_mask = 0x7,
1616         .ftx0cnt_off = 8,
1617 };
1618
1619 static const struct samsung_i2s_dai_data i2sv3_dai_type = {
1620         .quirks = QUIRK_NO_MUXPSR,
1621         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1622         .i2s_variant_regs = &i2sv3_regs,
1623 };
1624
1625 static const struct samsung_i2s_dai_data i2sv5_dai_type = {
1626         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1627                         QUIRK_SUPPORTS_IDMA,
1628         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1629         .i2s_variant_regs = &i2sv3_regs,
1630 };
1631
1632 static const struct samsung_i2s_dai_data i2sv6_dai_type = {
1633         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1634                         QUIRK_SUPPORTS_TDM | QUIRK_SUPPORTS_IDMA,
1635         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1636         .i2s_variant_regs = &i2sv6_regs,
1637 };
1638
1639 static const struct samsung_i2s_dai_data i2sv7_dai_type = {
1640         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1641                         QUIRK_SUPPORTS_TDM,
1642         .pcm_rates = SNDRV_PCM_RATE_8000_192000,
1643         .i2s_variant_regs = &i2sv7_regs,
1644 };
1645
1646 static const struct samsung_i2s_dai_data i2sv5_dai_type_i2s1 = {
1647         .quirks = QUIRK_PRI_6CHAN | QUIRK_NEED_RSTCLR,
1648         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1649         .i2s_variant_regs = &i2sv5_i2s1_regs,
1650 };
1651
1652 static const struct platform_device_id samsung_i2s_driver_ids[] = {
1653         {
1654                 .name           = "samsung-i2s",
1655                 .driver_data    = (kernel_ulong_t)&i2sv3_dai_type,
1656         },
1657         {},
1658 };
1659 MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids);
1660
1661 #ifdef CONFIG_OF
1662 static const struct of_device_id exynos_i2s_match[] = {
1663         {
1664                 .compatible = "samsung,s3c6410-i2s",
1665                 .data = &i2sv3_dai_type,
1666         }, {
1667                 .compatible = "samsung,s5pv210-i2s",
1668                 .data = &i2sv5_dai_type,
1669         }, {
1670                 .compatible = "samsung,exynos5420-i2s",
1671                 .data = &i2sv6_dai_type,
1672         }, {
1673                 .compatible = "samsung,exynos7-i2s",
1674                 .data = &i2sv7_dai_type,
1675         }, {
1676                 .compatible = "samsung,exynos7-i2s1",
1677                 .data = &i2sv5_dai_type_i2s1,
1678         },
1679         {},
1680 };
1681 MODULE_DEVICE_TABLE(of, exynos_i2s_match);
1682 #endif
1683
1684 static const struct dev_pm_ops samsung_i2s_pm = {
1685         SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
1686                                 i2s_runtime_resume, NULL)
1687         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1688                                      pm_runtime_force_resume)
1689 };
1690
1691 static struct platform_driver samsung_i2s_driver = {
1692         .probe  = samsung_i2s_probe,
1693         .remove = samsung_i2s_remove,
1694         .id_table = samsung_i2s_driver_ids,
1695         .driver = {
1696                 .name = "samsung-i2s",
1697                 .of_match_table = of_match_ptr(exynos_i2s_match),
1698                 .pm = &samsung_i2s_pm,
1699         },
1700 };
1701
1702 module_platform_driver(samsung_i2s_driver);
1703
1704 /* Module information */
1705 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
1706 MODULE_DESCRIPTION("Samsung I2S Interface");
1707 MODULE_ALIAS("platform:samsung-i2s");
1708 MODULE_LICENSE("GPL");